Re: Overclocking 5950U makes things slower.
I would suggest not even messing with the BIOS in the first place. I never did. If not done correctly, you stand a better chance of screwing your card more so than overclocking it. Do what you will, it's your card. Getting rid of my 5950U is not something I regret.
AMD FX-8320 Vishera 8-Core 3.5GHz (4.0GHz Turbo)
G.SKILL Ripjaws X Series 16GB (4x4GB)
EVGA SuperClocked GeForce GTX 760 2GB w/ EVGA ACX Cooler
MSI GTX 460 (Dedicated PhysX)